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Old 16-01-2012, 11:00 AM
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Screwdriverone (Chris)
I have detailed files....

Screwdriverone is offline
 
Join Date: Feb 2008
Location: Kellyville Ridge, NSW Australia
Posts: 3,306
Question Is this the core of the Rosette Nebula?

Hi Everyone,

I was tooling around the other night with my AP set up and wanted to see if I could find some other cool things of which to take photos...

I found my goto was a bit wonky so I manually locked onto Aldebaran and then synched the scope using Stellariumscope and then clicked on the Rosette Nebula and whoosh, off she went there. I double checked using Betelgeuse and the camera exposure confirmed I was on target, so I went back to Rosette and took this quick snap....(25 secs at ISO 1600).

I wanted to make sure I was on target and couldnt seem to find any nebulosity.....

Questions:

1) IS this the central cluster? It sure looks like it when I compare the stars to Stellarium and Mike Sidonio's core on IOTW.
2) Assuming I am in the right spot....How come I cannot see ANY nebulosity even on a relatively short 25 sec @ ISO 1600...? Is it a VERY diffuse nebula or is it predominately Hydrogen Alpha which my camera cant do....?

I took a similar shot of M1 - Crab Nebula just next door to this and I could see the blob, so I am assuming that my theory in 2) above applies and its simply too dim to capture anything with such a short exposure?

Hope I am not going loopy and shooting the wrong thing, but Flame, M42 and as I said, M1 all stopped on the money using Stellarium scope, central to the sensor and something the camera confirmed each time...

PS. I have attached a 15 sec ISO 1600 snap of M1 as a comparison in the second photo....

Am I right?

EDIT: Hmmmm, Astrometry.net result of the plate solve shows it IS the core of the Rosette, sounds like I might be right regarding the nebula? So the original question changes to can anyone confirm just how dim this nebula is with a standard DSLR?

I have added the astrometry.net result image also...

Cheers

Chris
Attached Thumbnails
Click for full-size image (rosette core.JPG)
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Click for full-size image (M1 test.JPG)
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Click for full-size image (Astrometry result.png)
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Last edited by Screwdriverone; 16-01-2012 at 11:07 AM. Reason: Added M1 test snap
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